TODAY MAY29
TEMPERATURE46
HUMIDITY76
PRESSURE102070
WIND COND.40 5.4
  • 6840Wed
  • 7243Thu
  • 7752Fri
  • 7849Sat
  • 7452Sun
daynightWeather update from Sunnyside Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Prosser for July is 80.3 degrees
  • The lowest monthly average temperature in Prosser for January is 29.9 degrees
  • The most monthly precipitation in Prosser occurs in September with 2.3 inches
  • The air quality index in Prosser is 12% better than the national average
  • The pollution index in Prosser is 74% better than the national average

Compare Prosser, WA Weather

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      Prosser Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January23°F37°F30°F0.7"
      February28°F49°F38°F1.2"
      March37°F61°F49°F1.8"
      April40°F67°F54°F0.9"
      May50°F78°F65°F1.7"
      June55°F83°F69°F1.4"
      July64°F95°F80°F1.1"
      August60°F92°F76°F1.4"
      September51°F80°F66°F2.3"
      October42°F64°F53°F1.8"
      November32°F47°F40°F1.5"
      December25°F37°F31°F2.1"

      Prosser air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexProsserWashingtonNational
      Air quality index373642
      Pollution index697,9424,541,8502,726,193

      Prosser air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality303
      Days with moderate air quality62
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Prosser air quality information

      PollutantTotal
      Arsenic0.020%
      Benzene0.004%
      Carbon Tetrachloride0.001%
      Lead0.010%
      Mercury0.010%

      Average monthly Prosser temperature with heat index

      Prosser monthly precipitation with daily maximum

      Prosser monthly snow depth with daily maximum

      Prosser monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Benton City, WA3,4223726.0%
      Grandview, WA11,0753726.0%
      Mabton, WA2,1923824.0%
      Sunnyside, WA16,7033824.0%
      Prosser, WA6,2883726.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Jordan, MN6,289468.0%
      Pahokee, FL6,2863628.0%
      Avra Valley, AZ6,285476.0%
      Corry, PA6,2853726.0%
      Kermit, TX6,2832844.0%
      Prosser, WA6,2883726.0%
      Source: The Prosser, WA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.